Physiological feedback systems and methods
AssigneePhysio-Control, Inc.
InventorsRobert G. Walker, Fred W. Chapman
Life of this patent
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Abstract
The disclosed physiological feedback systems and methods assist with assessing, monitoring and/or treating a patient experiencing a cardiac arrest event. The systems and methods receive multiple inputs and are continuous and/or iterative during a treatment session to provide physiological state trends of the patient. An index of the physiological state of the patient can be derived and confounders, and/or their effects, can be identified, and/or removed, from the index. Additionally, the systems and methods can assist with determining ischemic injury in a patient based on cerebral tissue oxygenation and/or other physiological data.
Claims20
A medical device comprising:
- an airway sensor configured to detect a level of carbon dioxide expelled from an airway of an individual;
- an oximetry sensor configured to detect a blood oxygenation level of the individual;
- and
- a processor configured to:
- determine a threshold based on the level of carbon dioxide expelled from the airway of the individual;
- determine that the blood oxygenation level of the individual exceeds the threshold;
- and
- determine that the patient has experienced return of spontaneous circulation (ROSC) based on determining that the blood oxygenation level of the individual exceeds the threshold.
A medical device comprising:
- a first sensor configured to detect a first physiological parameter indicating a hemodynamic adequacy of an individual, the first physiological parameter being correlated with a confounder;
- a second sensor configured to detect a second physiological parameter indicating the hemodynamic adequacy of the individual, the second physiological parameter being non-correlated with the confounder;
- and
- a processor configured to:
- determine, based on the first physiological parameter, a threshold;
- compare the second physiological parameter to the threshold;
- and
- based on the comparison of the second physiological parameter to the threshold, determine a condition of the individual, wherein the condition comprises a return of spontaneous circulation (ROSC) of the individual, an effectiveness of cardiopulmonary resuscitation (CPR) performed on the individual, or a risk of cardiac re-arrest of the individual.
A device comprising:
- a processor;
- and
- memory storing instructions that, when executed by the processor, cause the processor to perform operations comprising:
- determining a threshold based on a first physiological parameter indicative of a hemodynamic adequacy of an individual, the first physiological parameter being correlated with a confounder;
- comparing the threshold to a second physiological parameter indicative of the hemodynamic adequacy of the individual, the second physiological parameter being non-correlated with the confounder;
- and
- based on the comparison of the second physiological comparison to the threshold, determine whether the individual is experiencing return of spontaneous circulation (ROSC).
Dependencies are inferred from the claim text.